42352121 has 12 divisors (see below), whose sum is σ = 51860880. Its totient is φ = 34390440.

The previous prime is 42352111. The next prime is 42352133. The reversal of 42352121 is 12125324.

It is not a de Polignac number, because 42352121 - 2²² = 38157817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42352093 and 42352102.

It is not an unprimeable number, because it can be changed into a prime (42352111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21815 + ... + 23676.

It is an arithmetic number, because the mean of its divisors is an integer number (4321740).

Almost surely, 2^42352121 is an apocalyptic number.

It is an amenable number.

42352121 is a deficient number, since it is larger than the sum of its proper divisors (9508759).

42352121 is a wasteful number, since it uses less digits than its factorization.

42352121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45524 (or 45517 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 42352121 is about 6507.8507204760. The cubic root of 42352121 is about 348.5713766061.

Adding to 42352121 its reverse (12125324), we get a palindrome (54477445).

The spelling of 42352121 in words is "forty-two million, three hundred fifty-two thousand, one hundred twenty-one".